21110211001121 has 16 divisors (see below), whose sum is σ = 24386037137280. Its totient is φ = 18060694030080.

The previous prime is 21110211001073. The next prime is 21110211001147. The reversal of 21110211001121 is 12110011201112.

It is a cyclic number.

It is not a de Polignac number, because 21110211001121 - 2¹⁰ = 21110211000097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110211001096 and 21110211001105.

It is not an unprimeable number, because it can be changed into a prime (21110211001171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2512661 + ... + 6966626.

It is an arithmetic number, because the mean of its divisors is an integer number (1524127321080).

Almost surely, 2^{21110211001121} is an apocalyptic number.

It is an amenable number.

21110211001121 is a deficient number, since it is larger than the sum of its proper divisors (3275826136159).

21110211001121 is a wasteful number, since it uses less digits than its factorization.

21110211001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9491224.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21110211001121 its reverse (12110011201112), we get a palindrome (33220222202233).

The spelling of 21110211001121 in words is "twenty-one trillion, one hundred ten billion, two hundred eleven million, one thousand, one hundred twenty-one".